The Automatic Vent Opener was designed to automatically control the temperature and humidity levels and offer additional ventilation when needed, making gardening easier. As the surroundings inside the greenhouse warms, the vent gradually opens to allow the right amount of air flow in to the greenhouse and closes when the temperature cools. The vent arm was made with a metallic cylinder containing wax which expands when heated to force a piston, which raises the windows, as the air gets warmer, then agreements as it cools, closing with the use of a spring and resetting the piston. All you need to do is certainly to install it on your own roof vent windows and it instantly starts functioning. The Automatic Vent Opener operates without the use of electricity and is compatible with all Palram greenhouse versions only. The solar powered Vent Opener will start to open as temperatures inside your greenhouse reach 68 degrees F with full-open at 80 degrees. It installs efficiently and will provide care-free ventilation.
Ingenious temperature-sensitive device that automatically opens and closes coldframe lids, greenhouse windows and also skylights. Works throughout the day and maintain a continuous interior climate, something extremely hard to accomplish by manual adjustments.

Requires no batteries or electricity.
It can be adjusted to start opening between 60-77°F. Fully open up at 86-90°F. Fully closed at 55°F.
Strongly recommended for all our glazed season extenders because it dramatically increases plant growth.
The hydraulic cylinder comes with a 1 year warranty. The average duration of the cylinder is definitely 5-10 years, even though some can last up to twenty years.

Screw directly into polycarbonate panels, wood, or metal frames. The Standard Vent Opener can open up a hinged home window or vent weighing just as much as 32 lb. For bigger panes use the stronger Gigavent with all metallic construction, to lift up to 65 lbs.

Note from the maker: Suggested to lubricate the piston rod yearly, this can help extend the duration of the hydraulic cylinder. Avoid solid grease, as dirt particles “glues” easily onto the piston rod and can damage the rubber. Also don’t forget to unlock the vent in the winter if departing the vent openers installed. A good weak winter sunlight can high temperature the hydraulic cylinder Greenhouse Vent Opener sufficiently to create it start pressing the piston rod outwards.
This solar vent control will open and close vents, in your solar gem greenhouse. It features two closing springs for extra power. The solar vent opener may be the only solar-driven control with a quick-release mounting bracket. Just grasp the “clutch” arm and squeeze for easy detachment. This allows vent to be fully opened for access to the interior.